<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>数据统计</el-breadcrumb-item>
			<el-breadcrumb-item>数据报表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图区域 -->
		<el-card>
			<!-- 2、为echarts准备一个具备大小的dom -->
			<div id="main" style="width: 800px; height: 400px"></div>
		</el-card>
	</div>
</template>

<script>
// 1、导入echarts
let echarts = require('echarts');
import _ from 'lodash'

export default {
	data() {
		return {
			// 折线图需要合并的数据
			options: {
				title: {
					text: '用户来源'
				},
				tooltip: {
					trigger: 'axis',
					axisPointer: {
						type: 'cross',
						label: {
							backgroundColor: '#E9EEF3'
						}
					}
				},
				grid: {
					left: '3%',
					right: '4%',
					bottom: '3%',
					containLabel: true
				},
				xAxis: [
					{
						boundaryGap: false
					}
				],
				yAxis: [
					{
						type: 'value'
					}
				]
			}
		};
	},
	created() {},

	// 此时页面上的元素以及被渲染完毕了
	async mounted() {
		// 3、基于准备好的dom，初始化echarts实例
		var myEchart = echarts.init(document.getElementById('main'));

		const { data: res } = await this.$http.get('reports/type/1');
		if (res.meta.status !== 200) {
			return this.$message.error('获取折线图数据失败！');
		}

		// 4、准备demo和配置项
        const result = _.merge(res.data, this.options)

		// 5、展示数据
		myEchart.setOption(result);
	},
	methods: {}
};
</script>

<style lang="less" scoped>
</style>